You can edit the nutrition goal of the goddess in the savefile located inside "%localappdata%/gain_factory". You can find the variable called "goddess_nutrition_goal" under the save that you're playing on and set it lower.
The nutrition goal of the player and the cowgirls are a little more complicated than the goddess. They are coded into the objects and aren't variables they carry, so the goals can't be changed.
For the player, you can give yourself upgrade points by changing the variables called "upgrade_points" and "upgrade_points_total" (edit both to avoid weird stuff happening).